Hi You could do a "push button before unplugging" sort of thing. Only write it on command. That way the eprom would last forever ...
Once an hour for a year would be 8760 writes. If it's a true eprom, that should be no problem. If it's rewriting flash, that could get exciting. I wonder if there's an eprom chip on the board / embedded eprom in a cpu or not... Bob -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Chris Albertson Sent: Thursday, January 12, 2012 12:18 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] FE-5680A Mechanical Question On Thu, Jan 12, 2012 at 9:10 AM, Bob Camp <[email protected]> wrote: > Hi > > One consideration is weather / when the FE writes the DDS setting to > internal EPROM. You can easily wear out an EPROM if it's writing every time > the DDS is updated. On the flip side, having the EPROM save the last correct > value might make the "unplug and walk around" part a bit easier. The user FE5680 manual suggests to write to EPROM once an hour. I might do that or I might have the controller detect the "unplug" event and then write to EPROM. Likely we don't change the offset more more then one every few hours if even that. Either way I think the rule is write no more then once every hour or so. Chris Albertson Redondo Beach, California _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
